Spineward deceleration

FIGURE 10.11 Response of human volunteers and the Hybrid in head and neck to 15 j spineward deceleration. The range of responses from human subjects is shown by the dotted lines, and the response of the manikin by the dashed lines (see text for explanation of the motions plotted). (RTO-MP-20,1999.)... 

Survivable Shocks and Impacts. Estimates for survivable exposures to single impacts and shocks are given for both headward acceleration and spineward deceleration in Table 10.2. For headward acceleration, experience with nonfatal ejections from militaiy aircraft suggests that a DRI of 18 is associated with a 5 to 10 percent probability of spinal injury among healthy, young males who are restrained in their seats. For spineward deceleration, the estimate is based on the head injury criterion (HIC), which was developed from the severity index (see Sec. 10.1.1). The metric is defined as ... 

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